* {
  box-sizing: border-box;
}

:root {
  --bg: #0f172a;
  --panel: #111827;
  --card: #1f2937;
  --text: #f8fafc;
  --muted: #cbd5e1;
  --accent: #60a5fa;
  --accent-2: #22c55e;
  --border: rgba(255,255,255,0.12);
}

body.light {
  --bg: #f8fafc;
  --panel: #ffffff;
  --card: #ffffff;
  --text: #0f172a;
  --muted: #475569;
  --accent: #2563eb;
  --accent-2: #16a34a;
  --border: rgba(15,23,42,0.12);
}

body {
  margin: 0;
  font-family: Arial, sans-serif;
  background:
    radial-gradient(circle at top left, rgba(96,165,250,0.24), transparent 34%),
    var(--bg);
  color: var(--text);
  transition: background 0.25s, color 0.25s;
}

.header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 8%;
  background: rgba(15, 23, 42, 0.75);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}

body.light .header {
  background: rgba(248, 250, 252, 0.75);
}

.logo {
  font-weight: 800;
  font-size: 22px;
  color: var(--accent);
}

.nav {
  display: flex;
  gap: 18px;
}

.nav a {
  color: var(--muted);
  text-decoration: none;
}

.nav a:hover {
  color: var(--accent);
}

.theme-btn,
.primary-btn,
.secondary-btn,
.more-btn {
  border: 0;
  border-radius: 999px;
  padding: 12px 18px;
  cursor: pointer;
  font-weight: 700;
}

.theme-btn,
.more-btn {
  background: var(--card);
  color: var(--text);
  border: 1px solid var(--border);
}

.primary-btn {
  background: var(--accent);
  color: white;
}

.secondary-btn {
  display: inline-block;
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
  text-decoration: none;
}

.hero {
  min-height: 72vh;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  align-items: center;
  gap: 40px;
  padding: 70px 8%;
}

.badge {
  display: inline-block;
  color: var(--accent-2);
  background: rgba(34,197,94,0.12);
  padding: 8px 12px;
  border-radius: 999px;
  font-weight: 700;
}

h1 {
  font-size: clamp(42px, 7vw, 78px);
  margin: 18px 0;
  line-height: 0.95;
}

h2 {
  font-size: 34px;
}

.hero p,
.section p {
  color: var(--muted);
  font-size: 19px;
  line-height: 1.6;
}

.actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 26px;
}

.counter {
  margin-top: 18px;
  font-weight: 700;
}

.hero-panel {
  min-height: 320px;
  border: 1px solid var(--border);
  border-radius: 28px;
  background:
    linear-gradient(135deg, rgba(96,165,250,0.25), transparent),
    var(--panel);
  display: grid;
  place-items: center;
  box-shadow: 0 24px 80px rgba(0,0,0,0.25);
}

.server-box {
  width: min(340px, 90%);
  padding: 28px;
  border-radius: 22px;
  background: rgba(255,255,255,0.08);
  border: 1px solid var(--border);
}

.dot {
  display: inline-block;
  width: 12px;
  height: 12px;
  background: var(--accent-2);
  border-radius: 50%;
  box-shadow: 0 0 18px var(--accent-2);
  margin-right: 8px;
}

code {
  color: var(--accent);
}

.section {
  padding: 46px 8%;
}

.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  padding: 24px;
  border-radius: 22px;
  transition: transform 0.2s, border-color 0.2s;
}

.card:hover {
  transform: translateY(-4px);
  border-color: var(--accent);
}

.info-box,
.form-result {
  margin-top: 18px;
  padding: 16px;
  border-radius: 14px;
  background: rgba(96,165,250,0.12);
  color: var(--text);
}

.contact form {
  display: grid;
  gap: 16px;
  max-width: 620px;
}

label {
  display: grid;
  gap: 8px;
  color: var(--muted);
}

input,
textarea {
  width: 100%;
  padding: 14px 16px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text);
  font-size: 16px;
}

textarea {
  min-height: 130px;
  resize: vertical;
}

.footer {
  padding: 28px 8%;
  color: var(--muted);
  border-top: 1px solid var(--border);
}

@media (max-width: 800px) {
  .header {
    align-items: flex-start;
    flex-direction: column;
  }

  .hero {
    grid-template-columns: 1fr;
  }

  .cards {
    grid-template-columns: 1fr;
  }
}